ZIP code 21543 is officially located in the state of Maryland, primarily serving the city of Midlothian. It falls under the administrative jurisdiction of Allegany County. When planning mail delivery, logistics routing, or demographic research, 21543 operates within the Eastern Time (ET) timezone and supports the 485 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21543 ZIP Code Tabulation Area is approximately 27,785. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $71,543.